<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>数值拓展</title>
</head>
<body>
    <script>
        // 0. Number.EPSION 是JS表示的最小精度 
        console.log(0.1+0.2 === 0.3);
    </script>
</body>
</html>